Improvement in car-springs



MURRAY.A Car- Spring,

Patented June B, 1865.

NJEERS PHOTO-DTHUGRAFHER. WASHINGTON, D4 C.

UNITED STATES PATENT OFFICE.

JOHN MURRAY, OE NEW YORK, N. Y.

IMPROVEMENT IN CAR-SPRINGS.

Specification forming part of Letters Patent No. 48,084, dated June 6, 1865.

studs or spindles which constitute the spring,

by which this plate is madeto answer the two- `fold purpose ot' a base for the upper set of springs and a cap for the lower set, and also to Vact as a guide to hold both sets of springs, those of the upper and those of the lower box y in a vertical position, and allowing at the same time the play of the springs and the sliding of the spirals or studs through the plate.

Figure I represents a vertical section, and Fig. Il a horizontal section, of my improved spring.

In the accompanying drawings, A represents the bottom case of the spring, to which a number of studs or spindles, a a-say eight or more-are fastened, around which the spiral springs n a are placed. Over this case A a cap, B, is placed, iittingloosely over the saine, and provided with a division-plate, C, arranged with suitable holes, into which the studs a a t, and wherein said studs are guided.

Over the upper end of this cap B a top box,

D, is fitted loosely, provided with studs or spindles w, the number of which should be less than those in the bottom case-say about one-half. Spiral springs m are likewise placed around those studs or spindles w. The ends of those studs w pass through suitableholes in the division-plateC of the cap or central part, B, and are thereby guided. The top box, D, and the bottom box, A, are secured together by a central bolt, S, secured into the top box,

D, and arranged with its head tting into a central recess, so as to allow the free action of the spring without said head coming below the under side of the bottom box, A.

The dividing-plate C is constructed in one piece with the sliding cap or cover B, which shuts over the lower box, A, and under or within the upper box, D, and it is pierced with holes w a, Fig. II, directly above the spindies a of the lower box and directly below the spindles w of the upper box, and with the apertures suliciently large to permit the spindles to slide easily back and forth., by which the springs are kept in a vertical position, and at the same time the play of the springs and of the boxes above and below are provided for.

The greatdisadvantage of spiral springs arranged in a box or case, whether putinloosely or packed with an elastic substance, arises from their bending or bulging out in one or the other direction while said springs arein act-ion, which produces a rubbing against the side of the case, whereby the spring wears very quickly, is prevented in its free action, and causes the repeated breaking ofthe springs, while by my improvement the spring is guided through and by the apertures in the central division-plate, C, as described, and prevents any bending or bulging out in either direction, and consequently increases materially the efficiency of its action.

What I claim as my invention, and desire to secure by Letters Patent, is-

The peculiar construction of the divisionplate C, combined with the boxes, springs, and spindles or studs, by which it is madeto answer the twofold purpose of a cap and a base for the two boxes and sets of springs, respectively, and at the same time acts as a guide and support to the spindles and allowsthem the required action, as described.

JOHN MURRAY.

Witnesses:

HENRY E. ROEDER, WM.l BRIsTENsrEIN. 

